feat(gen-travis): add additional node version to travis.yml

Changes:
- Add node version `0.11` to the build list in travis.yml

Author: kingcody

.travis.yml

@@ -1,8 +1,9 @@
 language: node_js
 node_js:
   - '0.10'
+  - '0.11'
 before_install:
   - gem update --system
   - gem install sass --version "=3.3.7"
   - npm install -g bower grunt-cli
-services: mongodb
+services: mongodb